Submitted for Publication: June 7, 2013; final revision received September 17; accepted September 24, 2013.
Published Online: January 30, 2014. doi:10.1001/jamaophthalmol.2013.7671.
Study concept and design: R. Klein, Cruickshanks.
Acquisition of data: R. Klein, Cruickshanks, Danforth, Sivakumaran, Tsai, B. E. K. Klein.
Analysis and interpretation of data: R. Klein, Myers, Gangnon, Iyengar, B. E. K. Klein.
Drafting of the manuscript: R. Klein.
Critical revision of the manuscript for important intellectual content: Myers, Cruickshanks, Gangnon, Danforth, Sivakumaran, Iyengar, Tsai, B. E. K. Klein.
Statistical analysis: Myers, Gangnon, Iyengar.
Obtained funding: R. Klein, Cruickshanks, Iyengar, B. E. K. Klein.
Administrative, technical, and material support: Danforth.
Study supervision: R. Klein.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by National Institutes of Health grant EY06594 (Drs B. E. K. Klein and R. Klein), National Institute on Aging grant AG11099 (Dr Cruickshanks), and National Institute of Diabetes and Digestive and Kidney Diseases grant DK073217, National Institutes of Health, as well as, in part, by Research to Prevent Blindness, New York, New York. The National Eye Institute and National Institute of Diabetes and Digestive and Kidney Diseases provided funding for this study including collection and analyses of data; Research to Prevent Blindness provided additional support for data analyses.
Role of the Sponsor: The funding organizations had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Disclaimer: The content of this study is solely the responsibility of the authors and does not necessarily reflect the official views of the National Eye Institute or the National Institutes of Health.
Correction: This article was corrected online February 4, 2014, for an incorrect P value in the Results section.